Abstract
There are 19 faults in the main steam pipeline of a power plant, including structural failure, abnormal load bearing, abnormal displacement and other faults. Due to the low horizontal stiffness of the main steam pipe superheater header outlet, the pipe is subjected to periodic pulsation shock and resonates with the fixed frequency of the pipe. The failure of the main steam pipeline support hanger and pipeline vibration seriously affect the safe and stable operation of the unit. Through the calculation of piping stress and pipeline vibration test, a reasonable treatment scheme is formulated to solve the abnormal state of pipeline support and hanger and the pipeline vibration fault. It can provide reference for the maintenance of pipe system support and hanger and pipe vibration control of the same type of unit.
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